mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-04 22:21:23 +00:00
4e5b0ad582
Now that -EBUSY return code only indicates backlog queueing we can safely remove the now redundant check for the CRYPTO_TFM_REQ_MAY_BACKLOG flag when -EBUSY is returned. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
675 lines
15 KiB
C
675 lines
15 KiB
C
/* LRW: as defined by Cyril Guyot in
|
|
* http://grouper.ieee.org/groups/1619/email/pdf00017.pdf
|
|
*
|
|
* Copyright (c) 2006 Rik Snel <rsnel@cube.dyndns.org>
|
|
*
|
|
* Based on ecb.c
|
|
* Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the Free
|
|
* Software Foundation; either version 2 of the License, or (at your option)
|
|
* any later version.
|
|
*/
|
|
/* This implementation is checked against the test vectors in the above
|
|
* document and by a test vector provided by Ken Buchanan at
|
|
* http://www.mail-archive.com/stds-p1619@listserv.ieee.org/msg00173.html
|
|
*
|
|
* The test vectors are included in the testing module tcrypt.[ch] */
|
|
|
|
#include <crypto/internal/skcipher.h>
|
|
#include <crypto/scatterwalk.h>
|
|
#include <linux/err.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/scatterlist.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <crypto/b128ops.h>
|
|
#include <crypto/gf128mul.h>
|
|
#include <crypto/lrw.h>
|
|
|
|
#define LRW_BUFFER_SIZE 128u
|
|
|
|
struct priv {
|
|
struct crypto_skcipher *child;
|
|
struct lrw_table_ctx table;
|
|
};
|
|
|
|
struct rctx {
|
|
be128 buf[LRW_BUFFER_SIZE / sizeof(be128)];
|
|
|
|
be128 t;
|
|
|
|
be128 *ext;
|
|
|
|
struct scatterlist srcbuf[2];
|
|
struct scatterlist dstbuf[2];
|
|
struct scatterlist *src;
|
|
struct scatterlist *dst;
|
|
|
|
unsigned int left;
|
|
|
|
struct skcipher_request subreq;
|
|
};
|
|
|
|
static inline void setbit128_bbe(void *b, int bit)
|
|
{
|
|
__set_bit(bit ^ (0x80 -
|
|
#ifdef __BIG_ENDIAN
|
|
BITS_PER_LONG
|
|
#else
|
|
BITS_PER_BYTE
|
|
#endif
|
|
), b);
|
|
}
|
|
|
|
int lrw_init_table(struct lrw_table_ctx *ctx, const u8 *tweak)
|
|
{
|
|
be128 tmp = { 0 };
|
|
int i;
|
|
|
|
if (ctx->table)
|
|
gf128mul_free_64k(ctx->table);
|
|
|
|
/* initialize multiplication table for Key2 */
|
|
ctx->table = gf128mul_init_64k_bbe((be128 *)tweak);
|
|
if (!ctx->table)
|
|
return -ENOMEM;
|
|
|
|
/* initialize optimization table */
|
|
for (i = 0; i < 128; i++) {
|
|
setbit128_bbe(&tmp, i);
|
|
ctx->mulinc[i] = tmp;
|
|
gf128mul_64k_bbe(&ctx->mulinc[i], ctx->table);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(lrw_init_table);
|
|
|
|
void lrw_free_table(struct lrw_table_ctx *ctx)
|
|
{
|
|
if (ctx->table)
|
|
gf128mul_free_64k(ctx->table);
|
|
}
|
|
EXPORT_SYMBOL_GPL(lrw_free_table);
|
|
|
|
static int setkey(struct crypto_skcipher *parent, const u8 *key,
|
|
unsigned int keylen)
|
|
{
|
|
struct priv *ctx = crypto_skcipher_ctx(parent);
|
|
struct crypto_skcipher *child = ctx->child;
|
|
int err, bsize = LRW_BLOCK_SIZE;
|
|
const u8 *tweak = key + keylen - bsize;
|
|
|
|
crypto_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
|
|
crypto_skcipher_set_flags(child, crypto_skcipher_get_flags(parent) &
|
|
CRYPTO_TFM_REQ_MASK);
|
|
err = crypto_skcipher_setkey(child, key, keylen - bsize);
|
|
crypto_skcipher_set_flags(parent, crypto_skcipher_get_flags(child) &
|
|
CRYPTO_TFM_RES_MASK);
|
|
if (err)
|
|
return err;
|
|
|
|
return lrw_init_table(&ctx->table, tweak);
|
|
}
|
|
|
|
static inline void inc(be128 *iv)
|
|
{
|
|
be64_add_cpu(&iv->b, 1);
|
|
if (!iv->b)
|
|
be64_add_cpu(&iv->a, 1);
|
|
}
|
|
|
|
/* this returns the number of consequative 1 bits starting
|
|
* from the right, get_index128(00 00 00 00 00 00 ... 00 00 10 FB) = 2 */
|
|
static inline int get_index128(be128 *block)
|
|
{
|
|
int x;
|
|
__be32 *p = (__be32 *) block;
|
|
|
|
for (p += 3, x = 0; x < 128; p--, x += 32) {
|
|
u32 val = be32_to_cpup(p);
|
|
|
|
if (!~val)
|
|
continue;
|
|
|
|
return x + ffz(val);
|
|
}
|
|
|
|
return x;
|
|
}
|
|
|
|
static int post_crypt(struct skcipher_request *req)
|
|
{
|
|
struct rctx *rctx = skcipher_request_ctx(req);
|
|
be128 *buf = rctx->ext ?: rctx->buf;
|
|
struct skcipher_request *subreq;
|
|
const int bs = LRW_BLOCK_SIZE;
|
|
struct skcipher_walk w;
|
|
struct scatterlist *sg;
|
|
unsigned offset;
|
|
int err;
|
|
|
|
subreq = &rctx->subreq;
|
|
err = skcipher_walk_virt(&w, subreq, false);
|
|
|
|
while (w.nbytes) {
|
|
unsigned int avail = w.nbytes;
|
|
be128 *wdst;
|
|
|
|
wdst = w.dst.virt.addr;
|
|
|
|
do {
|
|
be128_xor(wdst, buf++, wdst);
|
|
wdst++;
|
|
} while ((avail -= bs) >= bs);
|
|
|
|
err = skcipher_walk_done(&w, avail);
|
|
}
|
|
|
|
rctx->left -= subreq->cryptlen;
|
|
|
|
if (err || !rctx->left)
|
|
goto out;
|
|
|
|
rctx->dst = rctx->dstbuf;
|
|
|
|
scatterwalk_done(&w.out, 0, 1);
|
|
sg = w.out.sg;
|
|
offset = w.out.offset;
|
|
|
|
if (rctx->dst != sg) {
|
|
rctx->dst[0] = *sg;
|
|
sg_unmark_end(rctx->dst);
|
|
scatterwalk_crypto_chain(rctx->dst, sg_next(sg), 0, 2);
|
|
}
|
|
rctx->dst[0].length -= offset - sg->offset;
|
|
rctx->dst[0].offset = offset;
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static int pre_crypt(struct skcipher_request *req)
|
|
{
|
|
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
|
|
struct rctx *rctx = skcipher_request_ctx(req);
|
|
struct priv *ctx = crypto_skcipher_ctx(tfm);
|
|
be128 *buf = rctx->ext ?: rctx->buf;
|
|
struct skcipher_request *subreq;
|
|
const int bs = LRW_BLOCK_SIZE;
|
|
struct skcipher_walk w;
|
|
struct scatterlist *sg;
|
|
unsigned cryptlen;
|
|
unsigned offset;
|
|
be128 *iv;
|
|
bool more;
|
|
int err;
|
|
|
|
subreq = &rctx->subreq;
|
|
skcipher_request_set_tfm(subreq, tfm);
|
|
|
|
cryptlen = subreq->cryptlen;
|
|
more = rctx->left > cryptlen;
|
|
if (!more)
|
|
cryptlen = rctx->left;
|
|
|
|
skcipher_request_set_crypt(subreq, rctx->src, rctx->dst,
|
|
cryptlen, req->iv);
|
|
|
|
err = skcipher_walk_virt(&w, subreq, false);
|
|
iv = w.iv;
|
|
|
|
while (w.nbytes) {
|
|
unsigned int avail = w.nbytes;
|
|
be128 *wsrc;
|
|
be128 *wdst;
|
|
|
|
wsrc = w.src.virt.addr;
|
|
wdst = w.dst.virt.addr;
|
|
|
|
do {
|
|
*buf++ = rctx->t;
|
|
be128_xor(wdst++, &rctx->t, wsrc++);
|
|
|
|
/* T <- I*Key2, using the optimization
|
|
* discussed in the specification */
|
|
be128_xor(&rctx->t, &rctx->t,
|
|
&ctx->table.mulinc[get_index128(iv)]);
|
|
inc(iv);
|
|
} while ((avail -= bs) >= bs);
|
|
|
|
err = skcipher_walk_done(&w, avail);
|
|
}
|
|
|
|
skcipher_request_set_tfm(subreq, ctx->child);
|
|
skcipher_request_set_crypt(subreq, rctx->dst, rctx->dst,
|
|
cryptlen, NULL);
|
|
|
|
if (err || !more)
|
|
goto out;
|
|
|
|
rctx->src = rctx->srcbuf;
|
|
|
|
scatterwalk_done(&w.in, 0, 1);
|
|
sg = w.in.sg;
|
|
offset = w.in.offset;
|
|
|
|
if (rctx->src != sg) {
|
|
rctx->src[0] = *sg;
|
|
sg_unmark_end(rctx->src);
|
|
scatterwalk_crypto_chain(rctx->src, sg_next(sg), 0, 2);
|
|
}
|
|
rctx->src[0].length -= offset - sg->offset;
|
|
rctx->src[0].offset = offset;
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static int init_crypt(struct skcipher_request *req, crypto_completion_t done)
|
|
{
|
|
struct priv *ctx = crypto_skcipher_ctx(crypto_skcipher_reqtfm(req));
|
|
struct rctx *rctx = skcipher_request_ctx(req);
|
|
struct skcipher_request *subreq;
|
|
gfp_t gfp;
|
|
|
|
subreq = &rctx->subreq;
|
|
skcipher_request_set_callback(subreq, req->base.flags, done, req);
|
|
|
|
gfp = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL :
|
|
GFP_ATOMIC;
|
|
rctx->ext = NULL;
|
|
|
|
subreq->cryptlen = LRW_BUFFER_SIZE;
|
|
if (req->cryptlen > LRW_BUFFER_SIZE) {
|
|
unsigned int n = min(req->cryptlen, (unsigned int)PAGE_SIZE);
|
|
|
|
rctx->ext = kmalloc(n, gfp);
|
|
if (rctx->ext)
|
|
subreq->cryptlen = n;
|
|
}
|
|
|
|
rctx->src = req->src;
|
|
rctx->dst = req->dst;
|
|
rctx->left = req->cryptlen;
|
|
|
|
/* calculate first value of T */
|
|
memcpy(&rctx->t, req->iv, sizeof(rctx->t));
|
|
|
|
/* T <- I*Key2 */
|
|
gf128mul_64k_bbe(&rctx->t, ctx->table.table);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void exit_crypt(struct skcipher_request *req)
|
|
{
|
|
struct rctx *rctx = skcipher_request_ctx(req);
|
|
|
|
rctx->left = 0;
|
|
|
|
if (rctx->ext)
|
|
kfree(rctx->ext);
|
|
}
|
|
|
|
static int do_encrypt(struct skcipher_request *req, int err)
|
|
{
|
|
struct rctx *rctx = skcipher_request_ctx(req);
|
|
struct skcipher_request *subreq;
|
|
|
|
subreq = &rctx->subreq;
|
|
|
|
while (!err && rctx->left) {
|
|
err = pre_crypt(req) ?:
|
|
crypto_skcipher_encrypt(subreq) ?:
|
|
post_crypt(req);
|
|
|
|
if (err == -EINPROGRESS || err == -EBUSY)
|
|
return err;
|
|
}
|
|
|
|
exit_crypt(req);
|
|
return err;
|
|
}
|
|
|
|
static void encrypt_done(struct crypto_async_request *areq, int err)
|
|
{
|
|
struct skcipher_request *req = areq->data;
|
|
struct skcipher_request *subreq;
|
|
struct rctx *rctx;
|
|
|
|
rctx = skcipher_request_ctx(req);
|
|
|
|
if (err == -EINPROGRESS) {
|
|
if (rctx->left != req->cryptlen)
|
|
return;
|
|
goto out;
|
|
}
|
|
|
|
subreq = &rctx->subreq;
|
|
subreq->base.flags &= CRYPTO_TFM_REQ_MAY_BACKLOG;
|
|
|
|
err = do_encrypt(req, err ?: post_crypt(req));
|
|
if (rctx->left)
|
|
return;
|
|
|
|
out:
|
|
skcipher_request_complete(req, err);
|
|
}
|
|
|
|
static int encrypt(struct skcipher_request *req)
|
|
{
|
|
return do_encrypt(req, init_crypt(req, encrypt_done));
|
|
}
|
|
|
|
static int do_decrypt(struct skcipher_request *req, int err)
|
|
{
|
|
struct rctx *rctx = skcipher_request_ctx(req);
|
|
struct skcipher_request *subreq;
|
|
|
|
subreq = &rctx->subreq;
|
|
|
|
while (!err && rctx->left) {
|
|
err = pre_crypt(req) ?:
|
|
crypto_skcipher_decrypt(subreq) ?:
|
|
post_crypt(req);
|
|
|
|
if (err == -EINPROGRESS || err == -EBUSY)
|
|
return err;
|
|
}
|
|
|
|
exit_crypt(req);
|
|
return err;
|
|
}
|
|
|
|
static void decrypt_done(struct crypto_async_request *areq, int err)
|
|
{
|
|
struct skcipher_request *req = areq->data;
|
|
struct skcipher_request *subreq;
|
|
struct rctx *rctx;
|
|
|
|
rctx = skcipher_request_ctx(req);
|
|
|
|
if (err == -EINPROGRESS) {
|
|
if (rctx->left != req->cryptlen)
|
|
return;
|
|
goto out;
|
|
}
|
|
|
|
subreq = &rctx->subreq;
|
|
subreq->base.flags &= CRYPTO_TFM_REQ_MAY_BACKLOG;
|
|
|
|
err = do_decrypt(req, err ?: post_crypt(req));
|
|
if (rctx->left)
|
|
return;
|
|
|
|
out:
|
|
skcipher_request_complete(req, err);
|
|
}
|
|
|
|
static int decrypt(struct skcipher_request *req)
|
|
{
|
|
return do_decrypt(req, init_crypt(req, decrypt_done));
|
|
}
|
|
|
|
int lrw_crypt(struct blkcipher_desc *desc, struct scatterlist *sdst,
|
|
struct scatterlist *ssrc, unsigned int nbytes,
|
|
struct lrw_crypt_req *req)
|
|
{
|
|
const unsigned int bsize = LRW_BLOCK_SIZE;
|
|
const unsigned int max_blks = req->tbuflen / bsize;
|
|
struct lrw_table_ctx *ctx = req->table_ctx;
|
|
struct blkcipher_walk walk;
|
|
unsigned int nblocks;
|
|
be128 *iv, *src, *dst, *t;
|
|
be128 *t_buf = req->tbuf;
|
|
int err, i;
|
|
|
|
BUG_ON(max_blks < 1);
|
|
|
|
blkcipher_walk_init(&walk, sdst, ssrc, nbytes);
|
|
|
|
err = blkcipher_walk_virt(desc, &walk);
|
|
nbytes = walk.nbytes;
|
|
if (!nbytes)
|
|
return err;
|
|
|
|
nblocks = min(walk.nbytes / bsize, max_blks);
|
|
src = (be128 *)walk.src.virt.addr;
|
|
dst = (be128 *)walk.dst.virt.addr;
|
|
|
|
/* calculate first value of T */
|
|
iv = (be128 *)walk.iv;
|
|
t_buf[0] = *iv;
|
|
|
|
/* T <- I*Key2 */
|
|
gf128mul_64k_bbe(&t_buf[0], ctx->table);
|
|
|
|
i = 0;
|
|
goto first;
|
|
|
|
for (;;) {
|
|
do {
|
|
for (i = 0; i < nblocks; i++) {
|
|
/* T <- I*Key2, using the optimization
|
|
* discussed in the specification */
|
|
be128_xor(&t_buf[i], t,
|
|
&ctx->mulinc[get_index128(iv)]);
|
|
inc(iv);
|
|
first:
|
|
t = &t_buf[i];
|
|
|
|
/* PP <- T xor P */
|
|
be128_xor(dst + i, t, src + i);
|
|
}
|
|
|
|
/* CC <- E(Key2,PP) */
|
|
req->crypt_fn(req->crypt_ctx, (u8 *)dst,
|
|
nblocks * bsize);
|
|
|
|
/* C <- T xor CC */
|
|
for (i = 0; i < nblocks; i++)
|
|
be128_xor(dst + i, dst + i, &t_buf[i]);
|
|
|
|
src += nblocks;
|
|
dst += nblocks;
|
|
nbytes -= nblocks * bsize;
|
|
nblocks = min(nbytes / bsize, max_blks);
|
|
} while (nblocks > 0);
|
|
|
|
err = blkcipher_walk_done(desc, &walk, nbytes);
|
|
nbytes = walk.nbytes;
|
|
if (!nbytes)
|
|
break;
|
|
|
|
nblocks = min(nbytes / bsize, max_blks);
|
|
src = (be128 *)walk.src.virt.addr;
|
|
dst = (be128 *)walk.dst.virt.addr;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(lrw_crypt);
|
|
|
|
static int init_tfm(struct crypto_skcipher *tfm)
|
|
{
|
|
struct skcipher_instance *inst = skcipher_alg_instance(tfm);
|
|
struct crypto_skcipher_spawn *spawn = skcipher_instance_ctx(inst);
|
|
struct priv *ctx = crypto_skcipher_ctx(tfm);
|
|
struct crypto_skcipher *cipher;
|
|
|
|
cipher = crypto_spawn_skcipher(spawn);
|
|
if (IS_ERR(cipher))
|
|
return PTR_ERR(cipher);
|
|
|
|
ctx->child = cipher;
|
|
|
|
crypto_skcipher_set_reqsize(tfm, crypto_skcipher_reqsize(cipher) +
|
|
sizeof(struct rctx));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void exit_tfm(struct crypto_skcipher *tfm)
|
|
{
|
|
struct priv *ctx = crypto_skcipher_ctx(tfm);
|
|
|
|
lrw_free_table(&ctx->table);
|
|
crypto_free_skcipher(ctx->child);
|
|
}
|
|
|
|
static void free(struct skcipher_instance *inst)
|
|
{
|
|
crypto_drop_skcipher(skcipher_instance_ctx(inst));
|
|
kfree(inst);
|
|
}
|
|
|
|
static int create(struct crypto_template *tmpl, struct rtattr **tb)
|
|
{
|
|
struct crypto_skcipher_spawn *spawn;
|
|
struct skcipher_instance *inst;
|
|
struct crypto_attr_type *algt;
|
|
struct skcipher_alg *alg;
|
|
const char *cipher_name;
|
|
char ecb_name[CRYPTO_MAX_ALG_NAME];
|
|
int err;
|
|
|
|
algt = crypto_get_attr_type(tb);
|
|
if (IS_ERR(algt))
|
|
return PTR_ERR(algt);
|
|
|
|
if ((algt->type ^ CRYPTO_ALG_TYPE_SKCIPHER) & algt->mask)
|
|
return -EINVAL;
|
|
|
|
cipher_name = crypto_attr_alg_name(tb[1]);
|
|
if (IS_ERR(cipher_name))
|
|
return PTR_ERR(cipher_name);
|
|
|
|
inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
|
|
if (!inst)
|
|
return -ENOMEM;
|
|
|
|
spawn = skcipher_instance_ctx(inst);
|
|
|
|
crypto_set_skcipher_spawn(spawn, skcipher_crypto_instance(inst));
|
|
err = crypto_grab_skcipher(spawn, cipher_name, 0,
|
|
crypto_requires_sync(algt->type,
|
|
algt->mask));
|
|
if (err == -ENOENT) {
|
|
err = -ENAMETOOLONG;
|
|
if (snprintf(ecb_name, CRYPTO_MAX_ALG_NAME, "ecb(%s)",
|
|
cipher_name) >= CRYPTO_MAX_ALG_NAME)
|
|
goto err_free_inst;
|
|
|
|
err = crypto_grab_skcipher(spawn, ecb_name, 0,
|
|
crypto_requires_sync(algt->type,
|
|
algt->mask));
|
|
}
|
|
|
|
if (err)
|
|
goto err_free_inst;
|
|
|
|
alg = crypto_skcipher_spawn_alg(spawn);
|
|
|
|
err = -EINVAL;
|
|
if (alg->base.cra_blocksize != LRW_BLOCK_SIZE)
|
|
goto err_drop_spawn;
|
|
|
|
if (crypto_skcipher_alg_ivsize(alg))
|
|
goto err_drop_spawn;
|
|
|
|
err = crypto_inst_setname(skcipher_crypto_instance(inst), "lrw",
|
|
&alg->base);
|
|
if (err)
|
|
goto err_drop_spawn;
|
|
|
|
err = -EINVAL;
|
|
cipher_name = alg->base.cra_name;
|
|
|
|
/* Alas we screwed up the naming so we have to mangle the
|
|
* cipher name.
|
|
*/
|
|
if (!strncmp(cipher_name, "ecb(", 4)) {
|
|
unsigned len;
|
|
|
|
len = strlcpy(ecb_name, cipher_name + 4, sizeof(ecb_name));
|
|
if (len < 2 || len >= sizeof(ecb_name))
|
|
goto err_drop_spawn;
|
|
|
|
if (ecb_name[len - 1] != ')')
|
|
goto err_drop_spawn;
|
|
|
|
ecb_name[len - 1] = 0;
|
|
|
|
if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME,
|
|
"lrw(%s)", ecb_name) >= CRYPTO_MAX_ALG_NAME) {
|
|
err = -ENAMETOOLONG;
|
|
goto err_drop_spawn;
|
|
}
|
|
} else
|
|
goto err_drop_spawn;
|
|
|
|
inst->alg.base.cra_flags = alg->base.cra_flags & CRYPTO_ALG_ASYNC;
|
|
inst->alg.base.cra_priority = alg->base.cra_priority;
|
|
inst->alg.base.cra_blocksize = LRW_BLOCK_SIZE;
|
|
inst->alg.base.cra_alignmask = alg->base.cra_alignmask |
|
|
(__alignof__(u64) - 1);
|
|
|
|
inst->alg.ivsize = LRW_BLOCK_SIZE;
|
|
inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg) +
|
|
LRW_BLOCK_SIZE;
|
|
inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg) +
|
|
LRW_BLOCK_SIZE;
|
|
|
|
inst->alg.base.cra_ctxsize = sizeof(struct priv);
|
|
|
|
inst->alg.init = init_tfm;
|
|
inst->alg.exit = exit_tfm;
|
|
|
|
inst->alg.setkey = setkey;
|
|
inst->alg.encrypt = encrypt;
|
|
inst->alg.decrypt = decrypt;
|
|
|
|
inst->free = free;
|
|
|
|
err = skcipher_register_instance(tmpl, inst);
|
|
if (err)
|
|
goto err_drop_spawn;
|
|
|
|
out:
|
|
return err;
|
|
|
|
err_drop_spawn:
|
|
crypto_drop_skcipher(spawn);
|
|
err_free_inst:
|
|
kfree(inst);
|
|
goto out;
|
|
}
|
|
|
|
static struct crypto_template crypto_tmpl = {
|
|
.name = "lrw",
|
|
.create = create,
|
|
.module = THIS_MODULE,
|
|
};
|
|
|
|
static int __init crypto_module_init(void)
|
|
{
|
|
return crypto_register_template(&crypto_tmpl);
|
|
}
|
|
|
|
static void __exit crypto_module_exit(void)
|
|
{
|
|
crypto_unregister_template(&crypto_tmpl);
|
|
}
|
|
|
|
module_init(crypto_module_init);
|
|
module_exit(crypto_module_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("LRW block cipher mode");
|
|
MODULE_ALIAS_CRYPTO("lrw");
|